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MACHINE FOR CROSS TURNNG SHEET METAL. No. 317,585.

Patented May 12, 1885.

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MACHINE EOE GEOSS TUNNING SHEET METAL. No. 317,585. Patented May 12, 1885.

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VANYSGHAIGK SHARP.

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MACHINE FOR GEOSS TURNING SHEET METAL.

Patented May 12,1885.

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UNiTnn STATES PATENT OFFICE.

VAN SOIJIAICK SHARP, OF VVEEDSIOR'I, NEV YORK, ASSIGNOR OF ONE- HALF TO VVALLAOE V. HOLOOMB, OF SAME PLAGE.

MACHlNE FOR CROSS-TURNING SHEET METAL.

S'ECIFICATION forming part of Letters Patent No. 317,585, dated May l2, 1885.

Application led November 11, 1884. (No model.)

To @ZZ whom it may concern:

Be it known that I, VAN ScHAIcK SHARP, a

resident of Weedsport, in the county ofGayuga l and State of New York, have invented certain new and useful Improvements in Machines for Cross-Turning Sheet Metal; and I do hereby declarethat the following isa full, clear, and exact description of the invention, that will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

Similar letters refer to similar parts in the several figures therein.

My invention relates to improvements in machines for cross-turning tin or other sheet metal.

The objects of my invention are, first, to provide a machine that will turn two edges at the same time; second, to provide a machine that may be operated from either side; third, to provide a clamping device for two edges of the sheet metal that may be operated by a single treadle; fourth, to provide a machine for cross-turning two edges of sheet metal at the same time with an adjusting device, by which the machine maybe readily adjusted to sheets of tin of different lengths.

Figure l of the drawings is a side elevation of my improved device. Fig. 2 is a top plan view of same. Fig. 3 is a vertical section taken at broken line x y in Fig. 2, showing a metal sheet in position to be clamped and bent. Fig. 4 is same, showing the sheet clamped and bent. Fig. 5 is an edge elevation of metal sheets with their bent edges hooked together. Fig. 6 is same with bent edges forced closely together.

A represents a frame or bench supported by legs A, and provided with horizontallyadjustable plates B and B, one on each end. Superimposed upon these plates are other vertically-adjustable plates,C and C. rIhe latter plates are supported and held in position by the downwardly-projecting lugs a ,which are connected at their lower ends by the links m m with the two arms Z Z. rlhe arms at their point of junction are connected with a treadle, t, by which they are operated. The springs n, attached at theirlower ends to the projecting arms and at their upperends to the frame, serve to elevate the arms, links, and plates C C', when the treadle is released, to the position shown in Figs. I and 3. A sheet of tin or any desired metal is then introduced from one end between the upper and lower plates and brought firmly against stop b, as shown in Fig. 3. The treadle is then operated, as before explained, to draw the plates O O down to the position shown in Fig. 4, which tightly clamps the sheet metal between the two sets of plates. 1

One ofthe upper plates, O, is provided with aleaf, D, hinged thereto and heldin line therewith by the spring S, fastened one end to the plate and' the other end to the leaf.

When the plate C is drawn down to plate B, as before explained, the leaf D is adapted to swing upon its hinges around to the position shown in Fig. 4, bending the sheet metal around the beveled edge of the plate B, as shown in said figure. On the other side of the frame the lower plate, B, is provided with the hinged leaf D, adapted toswing and bend the sheet metal around the beveled edge of plate C', as shown in Fig. 4.

To operate the hinged leaves, I provide an axle, J, extending across the frame and having at each end a disk, G, adapted to support at different angles the operating-lever L, also one end of the links H I:I, the other ends of the links being connected with the toothed segment-wheels d d. The segments of the latter are adapted to engage with the toothed segments e e', provided with dogs or trips h 7a', adapted to engage with the pins g g', as shown in Figs. l and 2.A It is evident, therefore, that a partial revolution of disk G will force the leaves D D from the plane of the tables to the position shown in Fig. 4. The upper plates are drawn down upon the sheet metal before the leaves D D are operated,which brings the pin g down in front of trip h to be engaged thereby. After the sheet meta-l is bent, as shown, the disks and segments are returned to their former position, (shown in Fig. 1,) and the treadle is released,whereupon the springs n throw the upper plates upward to the position shown in Fig. 1. Plate C is provided with a pin, la, which rides in the fcurved slot j of the I OO attachment j, which` is fixed to the frame A. The plate C travels to the right as viewed in Fig. l, as Well as upward, being aided thereto by the spring g, thus receding from its position Within the bent edge of the sheet metal shown in Fig. 4 Without effort to straighten the bent portion. The plates B and B are connected by rods O, screw-threaded tothe right at one end and to the left at the other, and provided with operatinghandles O', for revolving said rods in lugs P, projecting from B B, and threaded to correspond with the threaded ends of said rods, the object being to provide means .for adjusting the distance apart of the forming edges of plates B and C to the length of the Sheet; Of metal to be operated upon, Which is accomplished by revolving said rods to the right or left, as desired. The four lugs ci are all secured to the upper plates, and pass down through guidingslots in the lower plates. The stop b is spring-controlled, and recedes when the leaf D/ is bent over to position shown in Fig. 4, which brings the stop in contact with plate C and force-s it back through plate D Vagainst its controlling-spring.

What I claim as new, and desire to secure by Letters Patent, is-

l. In a machine for cross-turning metal, the

combination of plates B B, nuts P P, rod O,

and stop b, whereby plates of varying length may be held, substantially as described.

2. In a machine for crossturning metal, the two vertically-adjustable plates C G, one having an undercut bevel and the other provided With a hinged leaf. D, in combination With a bed having an undercut bevel at one end and at the other end a hinged leaf, D,With aspringstop, b, whereby the plates which are to be operated upon may be stopped, clamped, and turned, as described.

3. In a machine for cross-turning plates, the combination of the axle J, disks G G, lever L, links H H,toothed segment-wheels d d e e', the trips lz h, the pins g y', and the spring S, Whereby the hinged leaves may be operated, as described.

4. The combination, in. a lilachinekfor crossturning plates of metahwith a hinged leaf, D', of a stop, b, held yieldingly bya spring,\vhere by it may operate, as described.

5. The combination,with the lugs a a, of the links m. m, arms "Z, springs n n, and treadle Z, whereby plates C C may be operated, as set forth.

In testimony whereof Ihave hereunto set my hand this 22d day of October, 1884..

VAN SCHAICK SHARP.

Witnesses:

GEO. A. Mosnnn, XV. H. HoLLIs'rER, Jr. 

